How to Check DNS Records & Troubleshoot Global DNS Propagation [Guide complet et conseils pratiques]

What is the Domain Name System (DNS) & How Does It Work?

DNS serves as the address book of the Internet, translating human-friendly domain names (like toolsphere.local) into machine-routable IP addresses (like 192.0.2.1 or IPv6 2001:db8::1). When you configure custom domains, email services, or SSL certificates, verifying DNS records is the essential first step.

The 6 Essential DNS Record Types Every Webmaster Must Know

1. A Record (Address): Maps a domain or subdomain directly to an IPv4 host address.
2. AAAA Record (IPv6): Maps a domain to a modern 128-bit IPv6 address.
3. CNAME (Canonical Name): Creates an alias pointing one domain name to another domain (e.g. www to root).
4. MX (Mail Exchange): Directs incoming emails to designated mail servers (e.g. Google Workspace, Microsoft 365) with delivery priority levels.
5. TXT (Text Record): Carries machine-readable security verification keys, including SPF, DKIM, and DMARC for email anti-spoofing and Google Search Console domain ownership verification.
6. NS (Name Server): Specifies which authoritative DNS providers manage the domain's zone file (e.g. Cloudflare, Route 53).

How to Inspect DNS Records with ToolSphere

1. Open our free DNS Lookup & Inspector tool.
2. Enter your domain name (e.g. example.com).
3. Select specific record filters (A, MX, TXT, CNAME, NS) or view all records simultaneously.
4. Inspect TTL values, response times, and authoritative name server outputs to confirm global propagation!